The key to the new look and feel is a flatter, cleaner look, employing the translucence previously seen on iPhones and iPads in iOS 7.

Many of the familiar apps have icon redesigns, including what Federighi called the “gorgeous new trash can.”

More from Federighi’s Yosemite preview.

Apple Inc.

Three exceptional new features:

For people who want to focus on work, there’s a “dark mode” – the menu bar up top turns dark gray, with lighter gray text and icons.

The notification center has an iOS-like “today view,” capable of showing notifications from third-party apps you download from the Mac App Store, and other custom information from widgets.

Spotlight, the local Mac search, now includes content from the Internet. The search has been redesigned, too, with a big search field right in the middle of the screen, and faster shortcuts to launch apps and preview documents.